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Phnom Penh Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Phnom Penh.
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Climate overview of Phnom Penh
Phnom Penh Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Phnom Penh - and find the best time to visit.
Monthly Temperature in Phnom Penh
The climate in Phnom Penh remains fairly constant, offering very warm temperatures throughout the year. Average maximum daytime temperatures range from a very hot 37°C (99°F) in April, the warmest time of the year, to a very warm 33°C (91°F) during cooler months like December.
At night, you can expect temperatures ranging from 27°C (81°F) in April to around 23°C (73°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Phnom Penh
Phnom Penh is known for its substantial rainfall, with annual precipitation reaching 1415 mm (56 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives heavy rainfall, averaging 252 mm (9.9 in) of precipitation, recorded across 19 rainy days. In contrast, the driest month February brings less rainfall, with 12 mm (0.5 in) over 2 rainy days. For more details, please visit our Phnom Penh Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Phnom Penh
Seasonal changes in sunshine hours are quite dramatic in Phnom Penh. While March receives considerable daily sunshine with up to 9.0 hours, September marks the darkest time of the year, where sunshine is scarce with only 4.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Phnom Penh by Month
The relative humidity is high throughout the year in Phnom Penh.
The city experiences its highest humidity in September, reaching 84%. In February, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Phnom Penh
The mean wind speed varies between 2 m/s (4 knots) and 3 m/s (6 knots) throughout the year. It is lowest in January, February, May, September and October and highest during March, April, June, July, August, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Phnom Penh
For the most comfortable conditions available during the year, consider visiting Phnom Penh in December. Conditions are usually least comfortable in January, February, March, April, May, June, July, August, September and October.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very hot
Feb
very hot
Mar
very hot
Apr
very hot
May
very hot
Jun
very hot
Jul
very hot
Aug
very hot
Sep
very wet
Oct
very wet
Nov
mixed
Dec
good
- Best overall: December
- Warmest weather: March, April and May
- Most sunshine: January and March
- Fewest rainy days: January and February
- Wettest months: May, June, July, August, September and October, when rainfall is highest.
- Seasonal pattern: Distinct dry (December to February) and wet (August to October) seasons
Frequently asked questions about the climate in Phnom Penh
What is the best time to visit Phnom Penh?
December typically offers the most optimal weather in Phnom Penh. In contrast, January, February, March, April, May, June, July, August, September and October tend to have less optimal conditions. Phnom Penh has distinct dry (December to February) and wet (August to October) seasons.
What temperatures can I expect in Phnom Penh?
Daytime highs range from 33°C (91°F) in December to 37°C (99°F) in April. Nighttime lows range from 23°C (73°F) to 27°C (81°F). Temperatures stay relatively stable year-round.
How much rain does Phnom Penh get?
Annual rainfall is around 1415 mm (56 in). September is the wettest month with 252 mm (9.9 in), while February is the driest with 12 mm (0.5 in).
How sunny is Phnom Penh?
Phnom Penh receives around 2,501 hours of sunshine per year. March is the sunniest month with 270 hours, while September is the cloudiest with just 129 hours. Overall, Phnom Penh enjoys abundant sunshine.
Phnom Penh 3-Day Forecast
Phnom Penh on the map
Phnom Penh is highlighted - select any city to see its climate.
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Battambang
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